I'm not sure if Game Master mode will allow you to create custom summon spells to give to the players, but that would be cool.
Like a spell to summon Skeleton Archer or summon Cow or even summon a character of a playable race that you can alter in the character creator.
I think that last one would be super useful if you wanted to make a quest where you help a ghost and then get a spell to be able to summon them in battle or something like that (just like Nick in Orignal Sin 1)
